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    Patent Pending

    VBAC Risk Score for Successful Vaginal Delivery (Flamm Model)

    Predicts likelihood of successful vaginal birth after previous caesarean section (VBAC).
    When to Use
    Pearls/Pitfalls
    Why Use

    Women in labor with history of caesarean section delivery.

    • The VBAC Risk Score for Successful Vaginal Delivery (Flamm Model) is a simple scoring system for use at labor admission to predict which patients will have a successful vaginal birth after prior caesarean section (VBAC).
    • It includes cervical assessment which can only be used after admission for labor.
    • A high VBAC Risk Score predicts success, but a low score does not necessarily predict failure; clinical judgment should be always considered.

    Determining which laboring patients are likely to have successful or unsuccessful vaginal delivery would be helpful for labor planning and shared decision making.

    No
    0
    Yes
    +2
    Vaginal birth before and after first cesarean delivery
    +4
    Vaginal birth after first cesarean delivery
    +2
    Vaginal birth before cesarean delivery
    +1
    No previous vaginal birth
    0
    No
    0
    Yes
    +1
    > 75%
    +2
    25-75%
    +1
    < 25%
    0
    No
    0
    Yes
    +1

    Result:

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    Next Steps
    Evidence
    Creator Insights
    Dr. Bruce Flamm

    About the Creator

    Bruce Flamm, MD, is a clinical professor of obstetrics and gynecology at the University of California, Irvine, and has practiced obstetrics and gynecology at multiple Kaiser Permanente Medical Centers. He has published dozens of papers in peer-reviewed journals and four books, including Birth After Cesarean: The Medical Facts. Dr. Flamm also serves on the editorial board of several medical journals.

    To view Dr. Bruce Flamm's publications, visit PubMed

    Are you Dr. Bruce Flamm? Send us a message to review your photo and bio, and find out how to submit Creator Insights!
    MDCalc loves calculator creators – researchers who, through intelligent and often complex methods, discover tools that describe scientific facts that can then be applied in practice. These are real scientific discoveries about the nature of the human body, which can be invaluable to physicians taking care of patients.
    About the Creator
    Dr. Bruce Flamm
    Are you Dr. Bruce Flamm?